Method for rapidly evaluating quality of ginseng
A ginseng and fast technology, applied in the direction of material inspection products, measuring devices, instruments, etc., can solve the problems of no unified, effective, fast and accurate evaluation methods and technical means, and achieve the effect of simple operation
Active Publication Date: 2014-11-26
ZHEJIANG UNIV
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Problems solved by technology
These methods can give indicators similar to the sensory evaluation method, but in practical applications, especially for the detection of precious medicinal materials, quality identification based on aroma is relatively rare, and there is no unified, effective, fast and accurate evaluation method and technical means
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[0077] The invention is applicable to the aroma component analysis and quality evaluation of various famous and precious Chinese medicinal materials such as American ginseng, Korean ginseng, white ginseng and garden ginseng. In this embodiment, ginseng samples of different qualities are used as detection samples, and Agilent's gas chromatography-mass spectrometer and intelligent gas sensor system are used as detection instruments to describe in detail. The intelligent aroma sensing system is composed of 18 metal oxide gas sensors. Their models and response characteristics, typical detection gases are shown in Table 1:
[0078] Table 1: Typical detection objects and applications of gas sensor arrays
[0079]
[0080]
[0081] The collected ginseng rhizomes of different qualities are removed, cleaned, evaporated to dryness in a cool place, and sliced. Select uniform ginseng slices, divide the ginseng samples to be tested into different grades according to the national sta...
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The invention discloses a method for rapidly evaluating the quality of ginseng. According to the method disclosed by the invention, an intelligent aroma sensitive system is used for detecting the aroma of ginseng with different grades to obtain a sensor response signal; after the sensor is primarily optimized according to a step-by-step distinguishing method, three different characteristic value extraction methods are compared to obtain effective characteristic values of the optimized sensor and the effective characteristic values are taken as modeling data; a GC-MS (Gas Chromatography-Mass Spectrometer) is used for analyzing a change rule of aroma compounds to determine the content of sesquiterpenoids compounds and the content of aromatic compounds, and then a partial least squares (PLS) regression model between the content of the sesquiterpenoids compounds and the aromatic compounds and the optimized sensor is established so as to realize the evaluation on the quality of unknown ginseng. According to the method disclosed by the invention, the reasonable optimization of a gas sensor array is realized by virtue of a gas sensor array and gas chromatography coupling technique, a predication model for predicating the content of the sesquiterpenoids compounds and the content of the aromatic compounds is established, and further, the predication on the quality of ginseng is realized. The novel method provided by the invention is used for identifying the quality of ginseng in medicinal material markets.
Description
technical field [0001] The invention relates to a method for quickly assessing the quality of ginseng. Background technique [0002] Ginseng, American ginseng and other precious medicinal materials have important health care and anti-cancer effects. Ginseng slices of different qualities have similar shapes and colors, but there are large differences in drug efficacy and price differences. Therefore, shoddy products are common in the ginseng market. At present, the main methods for identifying the quality of ginseng at home and abroad include active ingredient content identification and sensory evaluation (aroma and taste). The former is based on chemical composition identification, and the pre-treatment is complicated, time-consuming, labor-intensive, and expensive; the latter is more common in the market. The evaluation index is easy to accept and the practice is simple, but the evaluation result is greatly affected by environmental factors and subjective factors. Combinin...
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IPC IPC(8): G01N30/02G01N33/15
Inventor 王俊崔绍庆
Owner ZHEJIANG UNIV